Fuel evaporating device for internal combustion engines



FUEL EVAPORA'IING DEVICE FOR INTERNAL COMBUSTION ENGINES R. WEHINGERJune 20, 1939.

Filed March 24, 1937 Patented June 20, 1939 UNITE SETES FUEL EVAPORATINGDEVICE FOR INTERNAL CUMBUSTION ENGINES Robert Wehinger,Nofels-Feldkirch, Vorarlberg, Austria Application March 24, 1937, SerialNo. 132,880 in Austria March 28, 1936 1 Claims.

The known fuel evaporating devices for internal combustion engines usemovable especially rotating parts for avoiding the formation of dropsusing heavy oils. The arrangement of the parts of these devices isarbitrary relating to space and therefore very long conduits arenecessary. The mounting, adjustment and survey of these known devices isvery expensive and disturbant.

The new device avoids rotating bodies and a separation of the parts fromone another. Following the invention this is realized by uniting theentering chamber, the heating chamber and the mixing chamber in a singlecasing.

By way of example a devi e is illustrated in the drawing. Fig. 1 is alongitudinal sectional view; Figs. 2 and 3 are sectional views followingthe lines I1 and 11-11 of Fig. The evaporating device i consists of arigid casing 3 closed on all sides, being connected with a device 2 forsupplying fresh air. This casing is divided in three chambers i, 5, 5(see Fig. 3). The entering chamber 4 and the mixing chamber 5 areconnected together by tubes 2, provided in a considerable number in theheating chamher 5; these tubes are suitable mounted in rows displaced toone another. Preferably these tubes are jointed to a unity beingarranged easily demountable in the casing, to enable a periodic cleaningof the tubes. For this purpose one side of the casing is detachablearranged by means of a plate 25 and screws or like. The heating chamber(3 is connected to the exhaust; preferably two exhaust pipes 8 arearranged in a manner that the openings are situated opposite and the hotburnt gases flow in the heating chamber 6 in a counter-currentapproximately perpendicular to the length of the tubes i (see arrows 9).Therefore a very great portion of each tube will be heatedat the sametime. The gases are carried off to the exhaust by a tube it in thedirection of the arrow 9, the opening of this tube preferably beingarranged approximately perpendicular to the length of the tubes 7 and ina manner that the gases enter and leave the heating chamber 6 in nearlydirections perpendicular to each other. The atomized fuel enters to theentering chamber 4 by way of the tube ii and first of all strikesagainst the hot plate 26, which effects the beginning of evaporating theatomized fuel. Following the direction of the arrows l2 the atomizedfuel enters the hot tubes 7, where the evaporation is finished. Theevaporated fuel leaves the tubes 1 following the arrows l3 and entersthe mixing chamber 5. A tube i4 unites this chamber 5 with the suctiontube of the engine. The conduit is for supplying the device with freshair also is united with the mixing chamber 5. A throttle l6 influencesthe quantity of fresh air entering the mixing chamber 5. A device 2preferably attached to the evaporating device i is arranged formoistening and cleaning the fresh air. In the drawing a device of thisknown manner consisting of a water box ii and a suction pipe i8 isillustrated. A netlike plate is or like may be arranged to prevent thewater flying off during shocks or like. The air. way is demonstrated bythe arrows 2i Regulating devices 2 i, 22, 33 of well known manner may bearranged. For the purpose described a little part of the cooling waterof the engine may be used by way of a conduit 24. The fresh air isheated in the same manner as the fuel atomized.

Having now described my invention I claim:

' l. A fuel evaporating device comprising a unitary casing, partitionsdividing said casing into an entering chamber, a heating chamber and. amixing chamber, respectively, and means to cause hot exhaust gases toflow into the heating chamber in a counter current approximatelyperpendicular to the direction of flow of fuel from the entering chamberto the mixing chamber, said partitions including a hot plate lyingnormal to the inflow direction of the fuel against which the fuelimpinges before passing from the entering chamber to the mixing chamber.

2. A fuel evaporating device consisting of an entering chamber, aheating chamber and a mixing chamber, these chambers being unitedtogether as a sole rigid casing, means in said casing for passing thefuel from the entering chamber through the heating chamber to the mixingchamber, exhaust pipes joined to said casing to deliver hot gases to theheating chamber, means to deliver fresh air into the mixing chamber,means to conduct the mixture from the mixing chamber, and a detachablecover plate secured over an opening in said casing for purposesdescribed.

3. A fuel evaporating device consisting of an entering chamber, aheating chamber and a mixing chamber, these chambers being unitedtogether as a sole rigid casing, a plurality of fuel conducting tubespassing through the heating chamber to conduct the fuel from theentering chamber to the mixing chamber, means to admit fresh air intothe mixing chamber, means to admit hot exhaust gases to the heatingchamber and to pass the same from the heating chamber, the hot gasesflowing through the heating chamher in a direction perpendicularrelative to the length of the tubes for the purpose of heating tubesapproximately over their full length, means to pass fuel into theentering chamber, and means to pass the mixture from the mixing chamber.

4. A fuel vaporizing device comprising a single casing divided bypartitions into three chambers, namely, a fuel entering chamber at thebottom and one side of the casing, a mixing chamber at the opposite sideof the casing and a heating chamber between the other two chambers,means to admit hot gases sidewise into said heating chamber, means topass hot gases from and through the top of said heating chamber, meansto admit fuel into the said entering chamber at the bottom, means toconvey the fuel from the entering chamber at the side of the casinghorizontally through the heating chamber to the mixing chamber in adirection at right angles to the direction at which the hot gases areadmitted and out of contact with such hot gases, and means to pass themixture from the mixing chamber.

5. A fuel evaporating device consisting of an entering chamber, aheating chamber and a mixing chamber, these chambers being unitedtogether as a sole rigid casing, a plurality of fuel conducting tubespassing through the heating chamber to conduct the fuel from theentering chamber to the mixing chamber, means to admit fresh air intothe mixing chamber, means to admit hot exhaust gases to the heatingchamber and to pass the same from the heating chamber, the hot gasesflowing through the heating chamber in a direction perpendicularrelative to the length of the tubes for the purpose of heating the tubesapproximately over their full length, means to pass fuel into theentering chamber, and means to pass the mixture from the mixing chamber,said means to admit hot exhaust gases comprising two pipes connected toopposite sides of the casing to deliver the hot gases to the heatingchamber in opposed currents.

6. A fuel evaporating device consisting of an entering chamber, aheating chamber and a mixing chamber, these chambers being unitedtogether as a sole rigid casing, a plurality of fuel conducting tubespassing through the heating chamber to conduct the fuel from theentering chamber to the mixing chamber, means to admit fresh air intothe mixing chamber, means to admit hot exhaust gases to the heatingchamber and to pass the same from the heating chamber, the hot gasesflowing through the heating chamber in a direction perpendicularrelative to the length of the tubes for the purpose of heating the tubesapproximately over their full length, means to pass fuel into theentering chamber, and means to pass the mixture from the mixing chamber,said means to admit hot exhaust gases being so positioned as to deliverthe gases perpendicularly to the direction in which the fuel is admittedto the entering chamber.

'7. A fuel evaporating device consisting of an entering chamber, aheating chamber and a mixing chamber, these chambers being unitedtogether as a sole rigid casing, a plurality of fuel conducting tubespassing through the heating chamber to conduct the fuel from theentering chamber to the mixing chamber, means to admit fresh air intothe mixing chamber, means to admit hot exhaust gases to the heatingchamber and to pass the same from the heating chamber, the hot gasesflowing through the heating chamber in a direction perpendicularrelative to the length of the tubes for the purpose of heating the tubesapproximately over their full length, means to pass fuel into theentering chamber, means to pass the mixture from the mixing chamber, anda plate positioned approximately perpendicular to the direction in whichthe fuel enters the device and positioned so as to be heated by the hotgases in the heating chamber by means of which plate the incoming fuelis partly vaporized, vaporizing of the fuel being completed in saidtubes.

ROBERT WEHINGER.

